MakeMyTrip India — denied stay in booked hotel.

I booked a hotel through makemytrip. Please find the details.
Dear *mayank*, your booking is confirmed.

*booking details*
Makemytrip id: nh[protected]
Pnr: [protected]
Check-in: sat, 21 dec 19, 12:00 pm
Check-out: sun, 22 dec 19, 11:00 am
Manage booking online at https://mmyt.biz/2PKnKt5

*hotel* *details*
Oyo 48128 saral resort, pondicherry
1, 2nd cross rd, anna nagar, periyamudaliyar
http://maps.google.com/maps?q=11.980465, 79.84481
For early check-in/special requests call: [protected]
Your booking is not free to cancel.

After reaching the hotel the manager denied the stay. After calling makemytrip they assured help and that too within 45 minutes. It's 12:30 after midnight still no resolution is provided. I been assured to be called within 5-10 minutes with resolution but nothing happened.